Butt-chisel.



PATENTED JULY 16, 1907.

J. E. HOWELL.

BUTT CHISEL.

APPLICATION rum) NOV. 12, 1906.

WITNESSES A TTORNE Y similar View of the underside thereof.

JOHN E. HOWELL, OF UKIAH, CALIFORNIA.

BUTT-CHISEL.

Specification of Letters Patent.

Patented July 16, 1907.

' Application filed November 12, 1906. Serial No- 343,033.

To all whom it may concern:

Be it known that I, Jenn E. HOWELL, a citizen of the United States,residing at Ukiah, in the county of'Mendocino and State of California,have invented new and useful Improvements in Butt-Chisels, of which thefollowing is a specification.

My invention relates to a tool which is especially designed forcuttingthe seats for butt hinges, and like work.

It consists inthe combination of a chisel, cutter and gage, and indetails of construction which will be more fully explained by referenceto the accompanying drawings, in which Figure 1 is a perspective view ofthe tool. Fig. 2 is a Fig. is a section through the blade and chisel.

It is the object of my invention to provide a device by which the seatsfor butt hinges may be rapidly and accurately cut.

As shown in the drawing, A is a chisel. This chisel has a sunken channelmade transversely in one edge, and in this channel is fitted a cuttingblade 2... This blade is slidable on a support 3, which is lixed to thechisel, and the blade is slotted and secured by a clamping screw .5.

The size of the hinge which is to be used being deter-.

mined, it is usual to lay out the outline of the seat by a longitudinaland transverse scribing mark, so that when the portion included betweenthese marks has been excavated, the leaf of the hinge will just lit theexcavated portion, and its upper surface will lie flush with the surfaceof the wood. This outline having been marked out and the thickness ofthe hinge leaf being ascertained, the cutting blade will be set so as tocut a depth equal to the thickness of the leaf. The gage 6"which'is'also slotted and adjustable, will be set with the downwardlyprojecting flange 6 at such a point that it will strike the edge of thewood which is being cut lor the hinge at the instant when the cuttingedge of the blade has reached the inner line of the proposed seat forthe hinge. The blade is preferably set at an incline, as shown.

The operationwill then be as follows: The chisel being laid flatwiseupon the part where the hinge seat is to be cut, and this part beingheld lirmly, by pushing the chisel transversely across it, the cutterwill shear away a portion of the wood at each impulse of the chiselacross the wood, the chisel being advanced in the direc tion of thelength of the seat after each cut. Thus with a sufficient number ofcuts, the whole length and width of the seat will be excavated. Theinclined position of the blade causes it to cut the wood more smoothlyand easily than if it was exactly vertical. At the end where the cutsare finished, there will be an incline on account of the inclineposition of the cutting blade; and this may be afterwards made verticalby turning the chisel until the cutting edge stands in a verticalposition, and then making a final cutting with it. The excavation orseat will have very nearly a perfect surface, but it may be finished bythe use of the edge of the chisel, which may be passed over the surfacelike a plane, and the vertical longer side may also be trimmed andplaned by the use of the chisel in the same manner.

Having thus described my invention, what I claim and desire to secure byLetters Patent is 1. The combination of n chisel blade and a separatecut tor carried thereby. the cutting edges ot' the chisel and cutterbeing arranged one at an angle to the other.

2. A tool for cutting seals for hinges. said tools consisting of nchanneled endwiso cutting member, and a cutting blade fixed in thechannel thereof in a plane substan tially at right angles to the planeof movement of said member, said blade extending above and below saidmember and having its cutting edge arranged at an angle to the cuttingedge of said member and adapted to cut trans versely at each li'nwardimpulse of said member.

3. A tool for cutting seats for the leaves of butt hinges, said toolincluding a handled-plate or chisel having an in elined channel made inone edge, a blade slidable and adjustable in said channel in :1 planesubstantially at right angles to the plane of the cutting edge of thechisel, and having its cutting edge along one of its long sides andprojecting below the chisel blade. a support for the blade, and

*a set-serew whereby the blade may be adjustable with relation to thesupport.

4. In a device [or cutting seats for butt hingedemes, :L

chisel-blade having an inclined channel made in one e(g and a supportsubstantially [lush with the plane of said channel, a slotted bladeslidable upon the support, a set screw by which the blade may be lockedwith its cuttingedge adjusted below the lower surface of thechisehblade, and an adjustable stop fixed to the edge of the chisel,said stop limiting the length of the transverse cut.

5. In a tool for cutting seats for butt hinge-leaves, a chisehhladehaving a handle, an incline slot or channel made in one edge of theblade, a support llxed to the blade substantially llush with the planeof inclination of the slot. :1 cutting blade slotted and slidable uponthe support, a clamping screw by which the said blade may be adjusted tocut a pre-detel-mined depth below the lower surface of the chisel, aslotted-stooplate fitted slidably upon the edge of the chisel, and alocking screw by which it maybe set at any adjustm nt.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

JOHN E. HOWELL.

Witnesses S. II. Nouusn, Flmnnniei; E. llAYXAIID.

